EEE can cause severe brain inflammation and has a mortality rate of 30%. Many who do recover continuing to have neurological problems. Six Wisconsin counties have reported cases in horses.
Connecticut also has reported West Nile virus in 40 towns across the state. Thankfully, no reports of WNV have been reported in Wisconsin this year; however, from 2015 through 2019, an average of 22 cases of West Nile virus have been reported each year. West Nile virus is preventable.